Figure 1. Schematic diagram of the preparation procedures of(a) the ZnO@Mo-Fe-MnO2 NA electrode and(b) the PVDF-Trfe/CNTs/BTO piezoelectric film, and (c)the SCSPC device. (d) XRD diffraction patterns of the prepared electrodes and current collectors. SEM images of (e) CC and CC/ZnO NAs and (f) the ZnO@Mo-Fe-MnO2 NAs.